12766565011 has 4 divisors (see below), whose sum is σ = 12975853024. Its totient is φ = 12557277000.

The previous prime is 12766564997. The next prime is 12766565017. The reversal of 12766565011 is 11056566721.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12766565011 - 2¹⁵ = 12766532243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12766565017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104643915 + ... + 104644036.

It is an arithmetic number, because the mean of its divisors is an integer number (3243963256).

Almost surely, 2^12766565011 is an apocalyptic number.

12766565011 is a deficient number, since it is larger than the sum of its proper divisors (209288013).

12766565011 is an equidigital number, since it uses as much as digits as its factorization.

12766565011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209288012.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 12766565011 in words is "twelve billion, seven hundred sixty-six million, five hundred sixty-five thousand, eleven".